document.write( "Question 1036815: the ten's digit of atwo digit number is three times the unit digit . the sum of the number and the unit digit is 32.find the number.
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Algebra.Com's Answer #651527 by ikleyn(52803) $\"\"$ $\"About$

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\n" ); document.write( "The ten's digit of a two digit number is three times the unit digit. The sum of the number and the unit digit is 32. Find the number.
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document.write( "Let the units digit be x. 0 <= x <= 9.\r\n" );
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document.write( "Then tens digit will be 3x.\r\n" );
document.write( "And the number itself will be 10*(3x)+x = 30x + x.\r\n" );
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document.write( "The fact that \"the sum of the number and the unit digit is 32\" means \r\n" );
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document.write( "(30x + x) + x = 32,  or   32x = 32.\r\n" );
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document.write( "Hence, x = 1.  \r\n" );
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document.write( "And the number is 31.\r\n" );
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